java.lang.ClassCastException: NameRank cannot be cast to java.lang.String

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via Coderanch by Nathan Doe, 1 year ago
NameRank cannot be cast to java.lang.String
java.lang.ClassCastException: NameRank cannot be cast to java.lang.String
at undefined.NameRank.compareTo(NameRank.java:1)
at java.util.TreeMap.put(TreeMap.java:545)
at java.util.TreeSet.add(TreeSet.java:238)
at undefined.CollectionsTest.main(CollectionsTest.java:213)

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